HSL Compliance Advanced Water Technologies Ltd
Registered name: HSL COMPLIANCE ADVANCED WATER TECHNOLOGIES LTD
Part of Mariner Topco Limited groupHSL Compliance Advanced Water Technologies Ltd made £704k profit in the year to 31 Dec 2024 (revenue not disclosed).
HSL Compliance Advanced Water Technologies Ltd reported £704k profit in the year to 31 Dec 2024, down 44% on the year before; its revenue was not disclosed. It had 81 employees. The company is classified under “water collection, treatment and supply” and is based in Ross-on-Wye; we hold 3 years of its filed accounts.
- Status
- Active
- Location
- Ross-on-Wye, West Midlands
- Age
- 24 yrs · since 2001
- Type
- Private Limited Company
Part of a group. The filing indicates this company sits within a group structure, so its results may depend on intra-group trading and it may be hard to replicate independently.
Key figures
This company published its profit but not its turnover, so revenue and margins are not disclosed. We never estimate them.
Badges are automated estimates derived from the filed figures — not statements of fact about the company.
Financial history
| Year to | 31 Dec 2022 | 31 Dec 2023 | 31 Dec 2024 |
|---|---|---|---|
| Disclosure | No P&L | Profit only | Profit only |
| Profit & loss | |||
| Revenue (turnover) | — | — | — |
| Profit after tax | — | £1.3m | £704k |
| Profit (best available) | — | £1.3m | £704k |
| Employees (average) | 50 | 61 | 81 |
| Ratios | |||
| Profit margin | — | — | — |
| Profit per employee | — | £20.5k | £8.7k |
| Growth (year on year) | |||
| Profit growth | — | — | ▼43.9% |
| Headcount growth | — | ▲22% | ▲32.8% |
| Balance sheet — indirect signals, not revenue | |||
| Cash at bank | £193k | £353k | £432k |
| Net assets | £1.1m | £1.9m | £1.7m |
| Fixed assets | £392k | £1m | £771k |
| Current assets | £1.8m | £2.8m | £2.9m |
| Debtors | £1.2m | £1.9m | £1.9m |
| Deferred income | — | £84.2k | £240k |
| Source | FullAccounts · bulk data Oct 2024 | FullAccounts · bulk data Oct 2024 | FullAccounts · bulk data Sep 2025 |
How the business works
- Profit margin
- —
- Profit ÷ revenue.
- Gross margin
- —
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- —
- Revenue ÷ average employees.
- Profit per employee
- £8.7k
- Profit ÷ average employees.
- Cash conversion
- —
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- —
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- —
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- —
- Money owed by customers. Low = customers pay quickly.
Balance-sheet signals
Year-on-year changes in filed balance-sheet items. They can hint at momentum (or investment) but are not revenue or profit and must not be read as such.
- Net assets
- ▼8%
- Now £1.7m
- Cash at bank
- ▲22%
- Now £432k
- Headcount
- ▲33%
- Now 81
- Deferred income
- ▲186%
- Now £240k
- Fixed assets
- ▼26%
- Now £771k
Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.
Group structure
Ownership chain
- Mariner Topco Limitedultimate parent75–100%
- Mariner Midco 1 Limited75–100%
- Mariner Midco 2 Limited75–100%
- Mariner Bidco Limited75–100%
- HSL Compliance Group Limited75–100%
- HSL Compliance Holdings Limited75–100%
- HSL Compliance Advanced Water Technologies Ltdthis company
Bands show the share of ownership each company holds in the one below it.
Sister companies (16)
- Albanyoak LimitedFigures not disclosed
- Apc Compliance LimitedRev. — · Profit £182k
- Coral Environmental LtdFigures not disclosed
- Crosmill Holdings LtdRev. — · Profit £987k
- Houseman Environmental LimitedRev. — · Profit £507k
- HSL Compliance (Northern Ireland) LimitedFigures not disclosed
- HSL Compliance Enitial LtdFigures not disclosed
- HSL Compliance LtdFigures not disclosed
- HSL Inspection and Testing LtdFigures not disclosed
- Ice Plumbing & Water Services LimitedFigures not disclosed
- Jordan Environmental LimitedFigures not disclosed
- Legionella Control International LimitedFigures not disclosed
- Plexus Innovation LimitedRev. — · Profit £289k
- R J Urmson Group LimitedRev. — · Profit £650k
- Saferspaces LimitedFigures not disclosed
- Treatment 4 Water LimitedFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
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Sources
Latest figures from FullAccounts for the year to 31 Dec 2024 (profit £704k), from the Companies House accounts bulk data published Sep 2025. Spotted an error? Request a correction.
Updated from Companies House on 13 Oct 2026
Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.